Scoring 1601 on Geekbench (compared to the iPhone 4S' 623), the iPhone 5 managed to surpass even the quad-core might of the Samsung Galaxy S3 (1591), HTC One X (1085) and even the Google Nexus 7 (1591)
Of course, there isn't a great deal of space between some of those scores – and this is just one of many benchmarks, none of which can categorically give a truly reliable reading into real-world usability.
Nonetheless, it should fuel the ongoing argument over whether 'four cores are better than two,' for a while at least.
Samsung Galaxy S4 coming in March 2013?
All of the iPhones together - but which was the very best